FN Archimer Export Format
PT J
TI Transient dynamics of a 2D granular pile
BT 
AF MUTABARUKA, Patrick
   KUMAR, Krishna
   SOGA, Kenichi
   RADJAI, Farhang
   DELENNE, Jean-Yves
AS 1:1;2:3;3:3;4:1,4;5:2;
FF 1:;2:;3:;4:;5:;
C1 Univ Montpellier 2, CNRS, UMR 5508, LMGC, F-34095 Montpellier 5, France.
   Univ Montpellier 2, Cirad, IATE, Montpellier Sup Agro,INRA,UMR1208, F-34060 Montpellier 1, France.
   Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
   MIT, MultiScale Mat Sci Energy & Environm, CEE, CNRS,UMI 3466, Cambridge, MA 02139 USA.
C2 UNIV MONTPELLIER, FRANCE
   UNIV MONTPELLIER, FRANCE
   UNIV CAMBRIDGE, UK
   MIT, USA
IF 1.625
TC 6
UR https://archimer.ifremer.fr/doc/00685/79685/82468.pdf
LA English
DT Article
AB We investigate by means of Contact Dynamics simulations the transient dynamics of a 2D granular pile set into motion by applying shear velocity during a short time interval to all particles. The spreading dynamics is directly controlled by the input energy whereas in recent studies of column collapse the dynamics scales with the initial potential energy of the column. As in column collapse, we observe a power-law dependence of the runout distance with respect to the input energy with nontrivial exponents. This suggests that the power-law behavior is a generic feature of granular dynamics, and the values of the exponents reflect the distribution of kinetic energy inside the material. We observe two regimes with different values of the exponents: the low-energy regime reflects the destabilization of the pile by the impact with a runout time independent of the input energy whereas the high-energy regime is governed by the input energy. We show that the evolution of the pile in the high-energy regime can be described by a characteristic decay time and the available energy after the pile is destabilized. 
PY 2015
PD MAY
SO European Physical Journal E
SN 1292-8941
PU Springer
VL 38
IS 5
UT 000354952200001
DI 10.1140/epje/i2015-15047-x
ID 79685
ER

EF